Air Duct Selector Switch Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**JJanzen** · 12-07-2008, 10:41 PM

I disassembled my interior air ducts this weekend in an effort to try and figure out why I wasn't getting air to the floor duct. In the process, I found this switch on the back side of the air duct selector. When trying to disconnect the plug, I pull the whole "guts" out of the switch and now need to replace it. This is on a 1972 Chevy truck with AC. The GM assembly manual only calls it a "switch ASM". Does anyone know what this does, what it is called and where I can find a new one? Thank you.

Joel

Longhorn Man · 12-07-2008, 11:18 PM

I am thinking that's the switch that kicks on the compressor

**JJanzen** · 12-07-2008, 11:44 PM

Longhorn Man,
That makes sense because it is "kicked on" when you move the control from heater to AC. Do you have any idea where I can get a new one? Thanks.....I knew you would have an answer for my question!!!

**JJanzen** · 12-08-2008, 05:11 PM

Today I had a chance to run by NAPA...they didn't have it but recommended a dealership. Dealership had a guy at the parts counter that had been there since 1970 and had never been asked for this part. He steered me to a division of Modern Chevrolet in Winston Salem, NC called Classic Muscle. They had the part (repop) and it was reasonably priced. The part is called "Air Conditioning Compressor Clutch Actuating Switch". If you ever have any hard to find parts, you might try them....OldMuscleCars.com
Thanks Andy for the help...it got me started to a solution.

72swbcamo · 12-08-2008, 10:25 PM

I'm pretty sure that LMC has this switch. You can also try the vendors on the board I think some of them should have it. That switch is not an uncommon item in the A/C section of most catalogs.

Andy4639 · 12-09-2008, 12:08 AM

That switch is common in A/C work. It's just a on/off switch to cut the compressor on. I have my electric fan hooked to it also. The fan will come on anytime the compressor is on.

12-07-2008, 10:41 PM	#1
JJanzen Senior Member Join Date: Feb 2008 Location: Denver, CO Posts: 252	Air Duct Selector Switch Question I disassembled my interior air ducts this weekend in an effort to try and figure out why I wasn't getting air to the floor duct. In the process, I found this switch on the back side of the air duct selector. When trying to disconnect the plug, I pull the whole "guts" out of the switch and now need to replace it. This is on a 1972 Chevy truck with AC. The GM assembly manual only calls it a "switch ASM". Does anyone know what this does, what it is called and where I can find a new one? Thank you. Joel Attached Images __________________ Blue72 Red72

12-07-2008, 11:18 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Air Duct Selector Switch Question I am thinking that's the switch that kicks on the compressor

12-07-2008, 11:44 PM	#3
JJanzen Senior Member Join Date: Feb 2008 Location: Denver, CO Posts: 252	Re: Air Duct Selector Switch Question Longhorn Man, That makes sense because it is "kicked on" when you move the control from heater to AC. Do you have any idea where I can get a new one? Thanks.....I knew you would have an answer for my question!!! __________________ Blue72 Red72

12-08-2008, 05:11 PM	#4
JJanzen Senior Member Join Date: Feb 2008 Location: Denver, CO Posts: 252	Re: Air Duct Selector Switch Question Today I had a chance to run by NAPA...they didn't have it but recommended a dealership. Dealership had a guy at the parts counter that had been there since 1970 and had never been asked for this part. He steered me to a division of Modern Chevrolet in Winston Salem, NC called Classic Muscle. They had the part (repop) and it was reasonably priced. The part is called "Air Conditioning Compressor Clutch Actuating Switch". If you ever have any hard to find parts, you might try them....OldMuscleCars.com Thanks Andy for the help...it got me started to a solution. __________________ Blue72 Red72

12-08-2008, 10:25 PM	#5
72swbcamo Active Member Join Date: Dec 2003 Location: Waterbury, CT Posts: 590	Re: Air Duct Selector Switch Question I'm pretty sure that LMC has this switch. You can also try the vendors on the board I think some of them should have it. That switch is not an uncommon item in the A/C section of most catalogs.

12-09-2008, 12:08 AM	#6
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Air Duct Selector Switch Question That switch is common in A/C work. It's just a on/off switch to cut the compressor on. I have my electric fan hooked to it also. The fan will come on anytime the compressor is on. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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